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core-collapse supernovae 1cosmic star formation history 1dust obscuration 1initial mass function 1star formation rate density 1

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20242026
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astro-ph.SR2026

SN 2024abvb: a Type Ibn/Icn supernova with evidence of helium and an extreme offset from its host galaxy

Callum Aster, Cosimo Inserra, Andrea Pastorello +27

We present spectroscopic and photometric observations and analysis of SN 2024abvb, a peculiar transitional Type Ibn/Icn supernova located at an unusually large projected distance f…